EP3446819B1 - Procédé d'affûtage d'un outil et combinaison d'une pièce de forme et d'un outil pour un tel procédé - Google Patents

Procédé d'affûtage d'un outil et combinaison d'une pièce de forme et d'un outil pour un tel procédé Download PDF

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Publication number
EP3446819B1
EP3446819B1 EP18180339.6A EP18180339A EP3446819B1 EP 3446819 B1 EP3446819 B1 EP 3446819B1 EP 18180339 A EP18180339 A EP 18180339A EP 3446819 B1 EP3446819 B1 EP 3446819B1
Authority
EP
European Patent Office
Prior art keywords
tool
depression
sharpening
shaped
shaped part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18180339.6A
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German (de)
English (en)
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EP3446819A1 (fr
Inventor
Reinhard Bucar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bucar Reinhard
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP3446819A1 publication Critical patent/EP3446819A1/fr
Application granted granted Critical
Publication of EP3446819B1 publication Critical patent/EP3446819B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D63/00—Dressing the tools of sawing machines or sawing devices for use in cutting any kind of material, e.g. in the manufacture of sawing tools
    • B23D63/08—Sharpening the cutting edges of saw teeth
    • B23D63/12—Sharpening the cutting edges of saw teeth by grinding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/06—Grinders for cutting-off
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/06—Grinders for cutting-off
    • B24B27/0641—Grinders for cutting-off for grinding holes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/013—Application of loose grinding agent as auxiliary tool during truing operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
    • B24D5/063—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental with segments embedded in a matrix which is rubbed away during the grinding process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/12—Cut-off wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/12—Cut-off wheels
    • B24D5/123—Cut-off wheels having different cutting segments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
    • B24D7/063—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental with segments embedded in a matrix which is rubbed away during the grinding process

Definitions

  • the invention relates to a method for sharpening a tool and a tool with a molded part for such a method.
  • Sharpening plates are used for resharpening concrete drill bits, for example in DE 40 27 821 A1 are known in the form of sleeve bottoms of a transport container.
  • the tool cuts the sharpening plate, which is made of a sharpening material, whereby the cutting edges of the tool are resharpened.
  • the use of sharpening plates is complex and leads to a longer interruption in material processing. Resharpening the tool on the sharpening plate is inefficient because parts of the sharpening plate break out and cannot be used for resharpening. The material yield of the sharpening material is limited.
  • the DE 602 08 602 T2 discloses an abrasive that is supplied in particulate form through the drill bit to the machining surface.
  • the object of the invention is to improve the sharpening of a tool, in particular to make it more uncomplicated and efficient.
  • the essence of the invention is that a molded part made of a sharpening material is arranged on a processing surface of a base material that is processed with a tool.
  • the molded part is also referred to as a sharpening molded part.
  • the tool can be stationary or mobile.
  • Self-sharpening of the tool is simplified. A separate sharpening plate is not necessary.
  • the material yield of the sharpening material is increased because the molded part is completely machined to re-sharpen the tool. There is no loss of material.
  • the fact that the sharpening process takes place directly on the base material reduces the downtime of the tool. A tool change can be avoided.
  • the utilization of the tool is increased.
  • the economy of material processing is increased.
  • the tool is in particular a separating tool, in particular for machining a basic material.
  • Tools are, for example, diamond tools or the like, in particular diamond-tipped drill bits, hollow drills and / or full drills for all common drilling diameters.
  • the tool is used in particular for dry drilling in stone-based material, in particular concrete, reinforced concrete, masonry, asphalt or the like, and / or in metal-based material, in particular steel, iron or the like.
  • the tool can also be used for wet drilling in the materials mentioned.
  • the tool can be disc-shaped, in particular as a diamond-tipped saw blade or wall saw blade or joint cutting blade for construction site saws, table saws or the like, as a cutting disc for all materials, in particular stone, various types of concrete, glass, metal or the like.
  • the disk-shaped tool is designed in particular in one of the common blade diameters.
  • the tool can also be a grinding or polishing wheel that is ceramic-bonded, metal-bonded and / or resin-bonded.
  • the tool can also be designed in the form of a line as a diamond-set rope, sword or chain saw or the like for concrete, reinforced concrete and other stone-based materials or metal materials, in particular steel, iron or the like.
  • the tool can also be a granite saw or a frame saw, which is used to process stone and / or wood.
  • a chainsaw can be used to process wood or plastic material.
  • a tool can also be a disk, in particular a disk with diamond tools for polishing and / or grinding.
  • the tool can also be a broaching tool.
  • the tool can be used for soil processing in reinforced concrete or similar material.
  • a method in which a depression is created in the base material with the tool along a depression direction, the tool is removed from the depression, the at least one molded part is inserted into the depression and the tool is reintroduced into the depression, enables increased process reliability .
  • the molded part is in particular attached to the tool in such a way that the molded part projects axially and / or radially on the tool at least in regions in the longitudinal direction of the tool, that is to say along a recess direction. It is advantageous if the molded part protrudes axially on the tool.
  • the molded part is used in particular for resharpening the end faces of the tool, in particular the end faces of the cutting edges of the tool.
  • the tool creates a recess in the base material.
  • the depression extends along a depression direction.
  • the at least one molded part, together with the tool, is inserted directly into the recess. After reinserting the tool and continuing processing, the molded part is machined in the recess.
  • the sharpening of the tool is improved. An immediate fixation of the molded part is unnecessary because the molded part is held in the recess. In particular, the molded part is held in the recess itself. The sharpening process takes place immediately in the recess. The procedure is not prone to errors.
  • Attaching the molded part to the tool before inserting it into the recess ensures a defined sharpening process.
  • the molded part can protrude on the tool in the axial direction.
  • the molded part is inserted into the recess together with the tool in a defined manner.
  • the molded part is positioned in a defined manner with respect to the tool.
  • a method according to claim 2 enables uncomplicated machining.
  • a depression according to claim 3 enables the molded part to be inserted immediately.
  • a groove-shaped cross-sectional area of the depression is generated, for example, by a saw, a chain or a rope.
  • a circular recess is created by a full drill.
  • An annular depression is created using a drill bit.
  • a tool according to claim 4 is advantageously resharpenable.
  • the molded part is attached to the tool according to claim 5 before insertion into the recess.
  • the attachment can be a fixation, for example by gluing.
  • the molded part can also be fastened to the tool by plugging on, clipping on, clipping on, latching and / or clamping, in particular in the circumferential direction on a drill bit.
  • the molded part can have projections which correspond to the cutouts of the drill bit, so that the molded part is fixed to the tool in at least one cutout of the tool, in particular in the circumferential direction, that is to say tangentially.
  • the molded part can have clip-like projections that engage cause the cutting edge of the tool to clamp the molded part.
  • the molded part can be designed in such a way that it has a section projecting axially on the tool, this section being designed as a hollow cylinder, which in particular has an identical diameter to the tool itself, that is to say identical inner diameter and identical outer diameter.
  • the molded part can also be used in particular with overhead depressions.
  • An overhead depression is present when a depression direction is directed at least partially vertically upwards and in particular exclusively vertically upwards. Drilling dust can escape against the direction of the depression as a result of gravity.
  • the insertion of a molded part directly into the recess is easily possible.
  • the molded part can be inserted into the recess quickly and error-free. It is advantageous if the molded part is designed such that it is clamped in the recess. An unintentional slipping, in particular falling out of the molded part from the recess, is prevented.
  • a tool with at least one molded part according to claim 6 simplifies the method according to the invention.
  • the fact that the molded part has sharpening material and in particular consists of a sharpening material ensures that the tool is automatically resharpened in the recess during material processing.
  • the molded part according to claim 6 ensures in particular the reliable resharpening of different tool materials.
  • Silicon carbide (SiC) and / or corundum or the like are suitable for sharpening diamond-studded cutting edges.
  • a molded part according to claim 7 is particularly suitable for an annular recess, which is generated in particular by a drill bit.
  • Molded sets with hollow cylinders or cylinder shell segments of different diameters can be provided, which are adapted to the diameter of the drill bits.
  • Cylinder shell segment molded parts can be attached directly to the tool, in particular glued, inserted, clamped, clicked or welded on.
  • the cylinder shell segments are in particular designed as half-shells, that is to say with an opening angle of 180 ° with respect to the longitudinal axis of the cylinder. Other opening angles, in particular 120 ° or 90 °, are also possible.
  • a molded part according to claim 8 enables an advantageous attachment to the tool and / or in the recess.
  • a conical or frustoconical shaped part can be designed in the shape of a thimble and can be placed directly on a drill.
  • a wedge-shaped molded part can be inserted directly into the depression, the wedge shape ensuring that the molded part self-clamps in the depression.
  • Rod-shaped or rod-shaped moldings can be used along the circumference of an annular recess. The rod-shaped or rod-shaped elements can also be inserted into a recess with a circular or groove-shaped cross-sectional area.
  • the molded parts can also be designed in the form of a plate. It is advantageously possible to provide the shaped parts, in particular the plate-shaped shaped parts, as breakable plates of a bar, similar to a chocolate bar. A predetermined breaking notch can be made between two adjacent tiles be provided. If necessary, a tile can be broken off the board.
  • the following is based on the 1 to 7 a tool 1 and a method for sharpening the tool 1 explained in more detail.
  • the tool 1 is essentially hollow-cylindrical with respect to a longitudinal tool axis 2.
  • the tool 1 is a drill bit that can be used in particular for dry or wet drilling concrete.
  • the tool 1 On a front machining end face 3, the tool 1 has a plurality of cutting edges 4, which are eight in the form of a cylindrical shell segment in the exemplary embodiment shown.
  • the cutting edges 4 are arranged at the same distance from one another along the circumference of the tool 1.
  • Two cutting edges 4 are arranged diametrically opposite one another with respect to the longitudinal axis 2 of the tool.
  • the cutting edges 4 are diamond-coated on the end face, on their inner surface and / or on their outer surface, in order to improve the machining of the base material 9.
  • a cutout 5 is provided in each case between two adjacent cutting edges 4, in particular to convey drilling dust into the interior of the drill bit.
  • the tool 1 has a torque transmission extension on a rear end face 6 opposite the machining end face 3 7 on.
  • the torque transmission extension 7 has an out-of-round contour, in particular an out-of-round outer contour, in particular an external hexagon, in order to transmit a drive torque from the machine tool to the tool 1.
  • the tool 1 has a hollow cylindrical base body 8.
  • the cutting edges 4 are integrally connected to the base body 8 on the processing end face 3.
  • the tool 1 is, as in Fig. 1 shown, positioned opposite the base material 9 to be processed.
  • the base material 9 is concrete.
  • the tool 1 is rotated with respect to the longitudinal axis 2 of the tool and is displaced relative to the base material 9 along a depression direction 10.
  • a depression 11 is created in the base material 9 by cutting the base material 9.
  • the depression 11 extends from a surface 12 of the base material 9 along the depression direction 10 to the first depth T 1 , as in FIG Fig. 2 shown.
  • the first depth T 1 indicates the distance from the base of the depression 11 along the longitudinal tool axis 2 to the surface 12 of the base material 9.
  • the deepening direction 10 is oriented parallel to the longitudinal axis 2 of the tool. In In a plane perpendicular to the direction of depression 10, the depression 11 is designed in a ring shape.
  • the cutting edges 4 wear out and become blunt due to the machining of the base material 9.
  • the tool 1 is, as in Fig. 3 shown, taken from the depression opposite the depression direction 10.
  • At least one molded part 13 is attached to the tool 8.
  • several, in particular eight, molded parts 13 are used, which are each arranged in the cutouts 5 between the cutting edges 4. This is in Fig. 4 shown.
  • the molded parts 13 are glued to the tool 1.
  • the molded parts 13 are fixed on the tool 1, that is to say held in a defined manner.
  • the molded part 13 is designed as a cylindrical shell segment. According to the exemplary embodiment shown, the molded parts 13 on the machining end face 3 are flush with the cutting edges 4. It is also conceivable that the molded parts 13 protrude on the machining end face 3 or are arranged set back.
  • the molded parts 13 are made from a sharpening material which, according to the exemplary embodiment shown, has silicon carbide.
  • the tool 1 with the molded parts 13 attached to it is reinserted into the recess 11. Is in Fig. 5 shown. Machining with tool 1 is continued. The molded part 13 is broken out and / or machined by the tool movement. Through the contact of the Cutting 4 with the sharpening material of the molded part 13 causes a sharpening, in particular an automatic re-sharpening of the cutting edges 4 of the tool 1 in the recess 11.
  • the tool 1 can be used directly and in particular without further removal from the depression 11 for further material processing in order to continue the depression 11 up to a second depth T 2 .
  • the automatic resharpening step is repeated by removing the tool 1 from the recess 11, using at least one molded part 13 and repeating the machining with the resharpening.
  • the automatic resharpening can be repeated any number of times.
  • Fig. 8 shows a plan view of the recess 11 according to Fig. 3 .
  • rod-shaped molded parts 14 can be inserted into the recess 11 along the recess direction 10. It is advantageous if the length of the molded parts 14 is less than the first depth T 1 .
  • the molded parts 14 have a circular cross section in a plane perpendicular to the longitudinal axis of the molded part.
  • the molded parts 14 can also have a non-circular, for example polygonal cross section.
  • a hollow cylindrical, in particular annular, molded part in the recess 11 along the recess direction 10 instead of the rod-shaped molded parts 14.
  • a molded part can also be designed as a cylinder half-shell or divided multiple times.
  • Fig. 9 shows a groove-like recess 15.
  • the recess 15 is designed as a rectangular groove.
  • the depression 15 on the groove base 16 can also have curves.
  • the specialization is according to Fig. 9 oriented essentially perpendicular to the plane of the drawing.
  • the depression 15 is produced, for example, by a saw blade or a cutting disc. The saw blade is displaced relative to the base material 9 along the direction of depression.
  • a wedge-shaped molded part 17 is provided, which is arranged in a clamping manner on the groove flanks 18 of the recess 15.
  • the molded part 17 is held reliably in the recess 15.
  • the geometry of the molded part 17, in particular the opening angle of the wedge arranged in the depression 15, the length of the wedge and the protrusion of the wedge with respect to the surface 12 of the depression 15 can be defined in a variable manner.
  • the molded part 17 projects above the surface 12.
  • the molded part 17 can also be selected such that it is flush with the surface 12 or is offset inward from the surface 12 in relation to the surface 12.
  • Fig. 10 shows a further embodiment with a tool 19 designed as a full drill.
  • a thimble-shaped molded part 20 is placed on the drill tip.

Claims (8)

  1. Procédé d'affûtage d'un outil (1 ; 19) comprenant les étapes de procédé suivantes
    - traitement d'une surface de traitement d'un matériau de base (9) à l'aide de l'outil (1 ; 19),
    - création d'un évidement (11) dans le matériau de base (9) à l'aide de l'outil (1 ; 19) suivant une direction d'évidement (10),
    - retrait de l'outil (1 ; 19) de l'évidement (11),
    - insertion d'au moins une pièce moulée (13 ; 20) constituée d'un matériau d'affûtage dans l'évidement (11),
    - réinsertion de l'outil (1 ; 19) dans l'évidement (11),
    - disposition d'au moins une pièce moulée (13 ; 20) au niveau de la surface de traitement,
    - poursuite du traitement à l'aide de l'outil (1 ; 19),
    - affûtage de l'outil (1 ; 19) par usinage par coupe de l'au moins une pièce moulée (13 ; 20) à l'aide de l'outil (1 ; 19),
    caractérisé en ce que l'au moins une pièce moulée (13 ; 20) est fixée à l'outil avant d'être insérée dans l'évidement (11).
  2. Procédé selon la revendication 1, caractérisé en ce que la direction d'évidement (10) est rectiligne.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'une surface de section transversale de l'évidement (11) orientée perpendiculairement à la direction d'évidement (10) est circulaire, annulaire ou en forme de rainure.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que l'outil (1 ; 19) présente au moins une arête coupante (4), qui est en particulier incrustée de diamants.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que l'au moins une pièce moulée (13 ; 20) est fixée à l'outil (1 ; 19) avant d'être insérée dans l'évidement (11).
  6. Combinaison d'au moins une pièce moulée (13 ; 20) et d'un outil (1) comprenant plusieurs arêtes coupantes (4), dans laquelle la pièce moulée (13 ; 20) est une pièce moulée d'affûtage pour l'affûtage des arêtes coupantes (4), et comporte un matériau d'affûtage, en particulier du carbure de silicium (SiC), du corindon, du corindon de zirconium, du nitrure de bore et/ou du diamant, caractérisée en ce que la pièce moulée (13 ; 20) est fixée à l'outil (1) et est appropriée pour la mise en œuvre d'un procédé selon l'une des revendications précédentes.
  7. Outil selon la revendication 6, caractérisé en ce que la pièce moulée (13) est réalisée sous la forme d'un cylindre creux ou d'un segment d'enveloppe cylindrique.
  8. Outil selon la revendication 6, caractérisé en ce que la pièce moulée (20) est conique, tronconique, cunéiforme, en forme de plaque, en forme de plaquette, en forme de tige ou en forme de bâtonnet le long d'un axe longitudinal de la pièce moulée.
EP18180339.6A 2017-08-23 2018-06-28 Procédé d'affûtage d'un outil et combinaison d'une pièce de forme et d'un outil pour un tel procédé Active EP3446819B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017214760.1A DE102017214760B3 (de) 2017-08-23 2017-08-23 Verfahren zum Schärfen eines Werkzeugs und Formteil für ein derartiges Verfahren

Publications (2)

Publication Number Publication Date
EP3446819A1 EP3446819A1 (fr) 2019-02-27
EP3446819B1 true EP3446819B1 (fr) 2020-08-05

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Family Applications (1)

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EP18180339.6A Active EP3446819B1 (fr) 2017-08-23 2018-06-28 Procédé d'affûtage d'un outil et combinaison d'une pièce de forme et d'un outil pour un tel procédé

Country Status (3)

Country Link
EP (1) EP3446819B1 (fr)
DE (2) DE102017214760B3 (fr)
DK (1) DK202000073Y3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017214760B3 (de) 2017-08-23 2019-01-24 BUCAR GmbH & Co KG Verfahren zum Schärfen eines Werkzeugs und Formteil für ein derartiges Verfahren
DE102022108782B3 (de) 2022-04-11 2023-05-04 Gbz Mannheim Gmbh & Co. Kg Verfahren zur kraftgesteuerten Selbstschärfung mindestens eines Schneidelements eines Bearbeitungswerkzeugs und Bearbeitungswerkzeug

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1583860A (en) * 1976-08-20 1981-02-04 Moppes & Sons Ltd L Van Core drills
DE4027821A1 (de) 1990-09-01 1992-03-05 Hilti Ag Transportbehaelter fuer bohrwerkzeuge mit schaerfboden
JP4053297B2 (ja) 2001-04-11 2008-02-27 三菱マテリアル株式会社 研削材及びそれを用いた穿孔工法
DE10252742A1 (de) 2002-11-13 2004-05-27 Hilti Ag Schärfmittel für Bohrkronen
DE20311567U1 (de) * 2003-07-25 2003-12-04 Wendt Longyear Gmbh Trennschleifwerkzeug zur abtragenden Materialbearbeitung
DE102017214760B3 (de) 2017-08-23 2019-01-24 BUCAR GmbH & Co KG Verfahren zum Schärfen eines Werkzeugs und Formteil für ein derartiges Verfahren

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
DE102017214760B3 (de) 2019-01-24
DK202000073U1 (de) 2020-08-14
DK202000073Y3 (da) 2020-09-22
DE202018006390U1 (de) 2020-03-30
EP3446819A1 (fr) 2019-02-27

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